Table 3.

ROC curve analysis of different body composition methods

Method	Threshold	Sensitivity	Specificity	ROC AUC	95% Confidence Interval	P Value
BMI, kg/m2	>36.4	66.7	88.9	0.83	0.69–0.92	0.0002
Weight, kg	>79.8	100	63.9	0.85	0.71–0.94	0.0001
Waist circumference-largest, cm	>101.7	88.9	75	0.89	0.76–0.96	0.0001
Waist circumference-umbilicus, cm	>101.7	88.9	74.3	0.89	0.75–0.96	0.0001
Waist circumference-iliac, cm	>99	100	66.7	0.84	0.7–0.93	0.0001
Waist circumference-mid, cm	>98.7	88.9	73.5	0.85	0.71–0.94	0.0001
Waist circumference-smallest, cm	>88.7	100	60	0.86	0.72–0.94	0.0001
Hip circumference, cm	>109	100	50	0.8	0.66–0.91	0.0009
Iliac waist-hip ratio	>0.85	77.8	58.3	0.7	0.54–0.82	0.057
Largest waist-hip ratio	>0.87	100	66.6	0.85	0.72–0.94	0.0001
Skin body fat, %	>36.4	88.9	68.6	0.79	0.64–0.89	0.002
Skin biceps, mm	>10.7	100	52.8	0.73	0.57–0.85	0.025
Skin subscapular, mm	>18.5	100	33.3	0.64	0.48–0.78	0.18
Skin suprailiac, mm	>22.3	100	47.2	0.71	0.55–0.83	0.043
Skin triceps, mm	>22.7	100	52.8	0.76	0.61–0.87	0.008
Abdomenal CT total area, mm2	>66800	88.9	80.6	0.85	0.71–0.94	0.0001
Abdomenal CT subcutaneous fat, mm2	>54700	66.7	91.7	0.8	0.66–0.91	0.0009
Abdpmenal CT visceral fat, mm2	>9962	100	77.8	0.95	0.84–0.99	0.0001
DXA fat left arm, %	>43.8	100	61.1	0.8	0.65–0.9	0.0012
DXA fat right arm, %	>42.1	100	63.9	0.83	0.69–0.92	0.0002
DXA fat left leg, %	>45	77.8	75	0.77	0.62–0.88	0.0043
DXA fat right leg, %	>44.6	77.8	77.8	0.76	0.61–0.87	0.0078
DXA fat trunk, %	>39.9	100	66.7	0.85	0.71–0.94	0.0001
DXA %fat total	>39.1	100	63.9	0.83	0.69–0.93	0.0001
DXA fat trunk, g	>16246	100	69.4	0.87	0.74–0.95	0.0001
DXA fat total, g	>31677	100	66.7	0.88	0.74–0.95	0.0001
DXA lean total, g	>45637	100	36.1	0.7	0.55–0.83	0.05
DXA lean trunk, g	>23323	100	61.1	0.77	0.62–0.88	0.004

ROC, receiver operator characteristic; CT, computed tomography; DXA, dual-energy X-ray absorptiometry.